Generac Power Systems 006873, Owners & Installation Manual

Page: 12 / 16

Section 3: Installation, Tests and Troubleshooting
8 Owner’s/Installation Manual for SMM
Figure 3-2. Mounting Dimensions
Connections
Figure 3-3. Wiring Diagram
1.
Turn OFF both UTILITY (NORMAL) and
EMERGENCY (STANDBY) power supplies before
connecting power source and load lines to transfer
switch and SMM.
NOTE: Suitable conduit fittings must be installed in
knockout openings when running supply and load wires.
NOTE: Use at least 75 ºC
(167 ºF)
rated wire and gauge
per installation instructions. Refer to table for
recommended wire size based on load current.
2.
Run line supply wires per applicable NEC code
articles for wiring method selected.
3.
Run load wires per applicable NEC code articles
for wiring method selected.
4.
Connect line supply wiring to line side of SMM
contactor field terminals. See
Figure 3-2 . Tighten
field terminals to 25 in-lbs (2.8 Nm).
5.
Connect load supply wiring to load side of SMM
contactor field terminals. See
Figure 3-2 .
NOTE: If neutral and ground wires are included, connect
inside SMM using a listed termination device.
The unit is now ready to configure, apply power, and
perform testing.
Setting Priorities
High priority 240 VAC loads should be set to the highest
priorities so those loads recover first, in the event of
generator overload.
NOTE: The highest priority, and first load to activate is
Priority 1. The last load to activate is Priority 8.
Setting priority determines timing for 3 scenarios:
•
Order in which loads recover
•
Delay time until power returns during an outage
•
Delay time for post load shed recovery
Height (in/mm)
H1 6.17/156.8
H2 2.36/60
Width (in/mm)
W1 7.06/179.4
W2 4.72/120
Depth (in/mm) D1 3.7/94
Legend
A
Red (240 VAC - Line)
B Black (240 VAC - Line)
C Red (240 VAC - Load)
D Black (240 VAC - Load)
E White - Neutral (as required)
F Green - Ground (as required)
G Black - Factory (PCB)
H Red - Factory (PCB)
I Blue - Factory (PCB)
J Blue - Factory (Jumper)
W1
W2
H2 H1
D1
000107
000108
A
B
E
F
C
D
I
H
G
J
Temperature rating of conductor: 75 ºC (167 ºF)
Conductor types (must be copper): RHW, THHW, THW,
THWN, XHHW, USE, ZW
Size AWG Maximum Current Rating
14 15A
12 20A
10 30A
8 50A*
* 40A for Type NM cable
Electrocution. Turn utility and emergency
power supplies to OFF before connecting
power source and load lines. Failure to do so
will result in death or serious injury.
(000116)
DANGER